CVE-2026-45962 PUBLISHED

ublk: Validate SQE128 flag before accessing the cmd

Assigner: Linux
Reserved: 13.05.2026 Published: 27.05.2026 Updated: 27.05.2026

In the Linux kernel, the following vulnerability has been resolved:

ublk: Validate SQE128 flag before accessing the cmd

ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before IO_URING_F_SQE128 flag check. This could cause out of boundary memory access.

Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return -EINVAL immediately if the flag is not set.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 71f28f3136aff5890cd56de78abc673f8393cad9 to 4b4dff498f46e9802f71bc84258bf73065f51c6a (excl.)
  • affected from 71f28f3136aff5890cd56de78abc673f8393cad9 to 31cac6acf77ece488f29fb8f79589d9298e969c8 (excl.)
  • affected from 71f28f3136aff5890cd56de78abc673f8393cad9 to dbe8e81a2ec608f87f79a34f6444cd62f6a243bb (excl.)
  • affected from 71f28f3136aff5890cd56de78abc673f8393cad9 to f75a5555e0049e7857eae25b60aee98b80e287ec (excl.)
  • affected from 71f28f3136aff5890cd56de78abc673f8393cad9 to 17d33ba7291100008360b5a354962db37ad80684 (excl.)
  • affected from 71f28f3136aff5890cd56de78abc673f8393cad9 to da7e4b75e50c087d2031a92f6646eb90f7045a67 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.0 is affected
  • unaffected from 0 to 6.0 (excl.)
  • unaffected from 6.1.165 to 6.1.* (incl.)
  • unaffected from 6.6.128 to 6.6.* (incl.)
  • unaffected from 6.12.75 to 6.12.* (incl.)
  • unaffected from 6.18.14 to 6.18.* (incl.)
  • unaffected from 6.19.4 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References